Improvement in hydrocarbon-burning steam-boilers



A. G. BUZBY. v i

improvement in Hydrocarb on-burning Sfeam Boilers.

N0.123,452, Patented Feb.6,1872.

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6% M4 yjzjl ATENT FFIGEO ALBERT G. BUZBY, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN HVDROCARBQN-BURNING STEAM-BOILERS.

Specification forming part of Letters Patent No. 123,452, dated February6, 1872.

Specification describing Improvements in Stea1nBoilers and mode ofapplying heat to steam-boilers, invented by ALBERT G. BUZBY, of city andcounty of Philadelphia and State of Pennsylvania.

Improvement in Steam-Boilers and Mode of Applying Heat t0 Steam-Boilers.

My invention consists in applying heat to a tubular boiler by injectingdirectly into the tubes hydrocarbon, hydrocarbon-vapor or ignitible gas,and superheated steam, so as to dispense with the usual furnaces orfire-places. My invention further consists of certain appliances, toofully explained hereafter to need preliminary description, to facilitatemy mode of applying heat directly to the tubes of the boiler.

Figure l is a vertical section of a steamboiler illustrating myinvention; Fig. 2, a front View of the same; and Figs. 3 and 4, detachedviews representing parts of my invention drawn to an enlarged scale.

The body or shell A of the boiler, is in the present instance,cylindrical; but its shape may be varied without departing from the mainfeatures of my invention. A series of tubes, B B, extend from the frontplate a of the boiler to the rear plate 1), behind which is situated thechamber D 5 and from the plate I) to the plate (I extendaseries ofuppertubes,E,forming a communication between the said chamber D and achamber, G, situated between the plate 01 and the front plate a of theboiler, and communieating with the chimney through the take-up f. Intoeach of the lower tubes B is inserted a cylinder, H, of baked fire-clayor other refractory material,round which is coiled atube, h, the coilbeing so bent that its orifice is directed into the cylinder H. Theother end on of each coil communicates with a pipe, K, for conveyingsteam from the steam-space of the boiler to the whole of the coil. Acylinder, H, of refractory material may extend the entire length of eachtube B but I prefer that it should be limited in length, as shown inFig. 1, each tube B from the cylinder rearward being lined at the bottomonly with refractory material formed by a half cylinder, H, of bakedfire-clay. The fuel to be used in myimproved boiler is petroleum orother hydrocarbon, or vapors of the same, or any imilammable gas, a jetof any of which may be injected into each tube H, when, owing to thesuperheated steam, a flame of such intense heat is created as to renderthe cylinders H red hot, the semi-cylindrical lining H being renderednearly as hot, and the tube B being consequently so heated as to rapidlygenerate steam within the boiler. Although I prefer to obtain thesuperheated steam by passing ordinary steam through a coil, h,surrounding the cylinder, as described, it may be derived from othersources. This steam has the efl'ect of driving the flame rearwardthrough the tubes B into the chamber D whenever the products ofcombustion pass through the upper tubes E to the chamber G, and thenceto the chimney. The coil h may be applied to the cylinder H while thelatter is in a plastic or semiplastic state, the tube sinking into theclay, and the latter being subsequently baked with the coil attached.When the fire-clay cylinders or coils, or both, become deteriorated bythe action of the flame, they can be readily replaced with new ones. Thelining H for the bottom of the tubes may also be readily withdrawnthrough a door-way, x, at the rear of the boiler.

able cocks to regulate the volume of superheated steam admitted to thetubes.

1 do not desire to. restrict myself to any specific shape of boiler, allthat is essential in carrying out my invention being the presence oftubes, within which the desired heat is generated, in the mannerdescribed, so as to dis pense entirely with the usual fire-place orfurnace.

I claim as my invention- 1. Applying heat to a tubular boiler byinjecting directly into the tubes hydrocarbon, hydrocarbon-vapor orinflammable gases, and superheated steam, as set forth.

2. The combination, with the refractory lining of a boiler-tube, of acoil of tubing, substantially as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALBERT G. BUZBY.

Witnesses:

WM. A. STEEL, JOHN K. Rurnnrus.

The main steam-pipe K and also the branch-pipes we should be furnishedwith suit-

